Campaign officials for former vice president Joe Biden defended the campaign from criticism on Sept. 13, including private remarks from Sen. Bernie Sanders (I-Vt.) reported by the Post. Read more: https://wapo.st/2E23PD2. Subscribe to The Washington Post on YouTube: https://wapo.st/2QOdcqK Follow us: Twitter: https://twitter.com/washingtonpost Instagram: https://www.instagram.com/washingtonpost/ Facebook: https://www.facebook.com/washingtonpost/